So I've been out of the running game for a long time. For well over a year I haven't been able to run. Even climbing the stairs was hard work. Turns out the human body needs a bit of haemoglobin to function. After a couple of weeks on vitamin D3, K2 and iron supplementation and I've been able to run a session on the treadmill at pacing beyond what could be classed walking. It has been a long time and it felt bloody great!